a28607f837
Original-commit: flang-compiler/f18@13870c0017 Reviewed-on: https://github.com/flang-compiler/f18/pull/484
65 lines
2.6 KiB
C++
65 lines
2.6 KiB
C++
// Copyright (c) 2018-2019, NVIDIA CORPORATION. All rights reserved.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#ifndef FORTRAN_COMMON_DEFAULT_KINDS_H_
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#define FORTRAN_COMMON_DEFAULT_KINDS_H_
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#include "Fortran.h"
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#include <cstdint>
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namespace Fortran::common {
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// All address calculations in generated code are 64-bit safe.
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// Compile-time folding of bounds, subscripts, and lengths
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// consequently uses 64-bit signed integers. The name reflects
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// this usage as a subscript into a constant array.
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using ConstantSubscript = std::int64_t;
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// Represent the default values of the kind parameters of the
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// various intrinsic types. Most of these can be configured by
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// means of the compiler command line; subscriptIntegerKind,
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// however, is fixed at 8 because all address calculations are
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// 64-bit safe.
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class IntrinsicTypeDefaultKinds {
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public:
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IntrinsicTypeDefaultKinds();
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static constexpr int subscriptIntegerKind() { return 8; }
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int doublePrecisionKind() const { return doublePrecisionKind_; }
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int quadPrecisionKind() const { return quadPrecisionKind_; }
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IntrinsicTypeDefaultKinds &set_defaultIntegerKind(int);
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IntrinsicTypeDefaultKinds &set_defaultRealKind(int);
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IntrinsicTypeDefaultKinds &set_doublePrecisionKind(int);
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IntrinsicTypeDefaultKinds &set_quadPrecisionKind(int);
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IntrinsicTypeDefaultKinds &set_defaultCharacterKind(int);
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IntrinsicTypeDefaultKinds &set_defaultLogicalKind(int);
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int GetDefaultKind(TypeCategory) const;
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private:
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// Default REAL just simply has to be IEEE-754 single precision today.
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// It occupies one numeric storage unit by definition. The default INTEGER
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// and default LOGICAL intrinsic types also have to occupy one numeric
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// storage unit, so their kinds are also forced. Default COMPLEX must always
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// comprise two default REAL components.
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int defaultIntegerKind_{4};
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int defaultRealKind_{defaultIntegerKind_};
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int doublePrecisionKind_{2 * defaultRealKind_};
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int quadPrecisionKind_{2 * doublePrecisionKind_};
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int defaultCharacterKind_{1};
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int defaultLogicalKind_{defaultIntegerKind_};
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};
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}
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#endif // FORTRAN_COMMON_DEFAULT_KINDS_H_
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